Datasheet

Electrical Characteristics
R
Intel
®
82845 MCH for DDR Datasheet 123
Symbol Signal
Group
Parameter Min Nom Max Unit Notes
DDR Interface
V
IL(DC)
(k,m) DDR Input Low Voltage SDREF – 0.15 V
V
IH(DC)
(k,m) DDR Input High Voltage SDREF + 0.15 V
V
IL(AC)
(k,m) DDR Input Low Voltage SDREF – 0.31 V
V
IH(AC)
(k,m) DDR Input High Voltage SDREF + 0.31 V
DDR Interface cont.
V
OL
(k,l) DDR Output Low Voltage 0.975 V 1
V
OH
(k,l) DDR Output High Voltage 1.80 V 1
I
OL
(k,l) DDR Output Low Current 9.375 mA 1
I
OH
(k,l) DDR Output High Current -9.375 mA 1
I
Leak
(k,m) Input Leakage Current ±10 uA
C
I/O
(k, l, m) DDR Input/Output Pin
Capacitance
4.690 5.370 pF
1.5 V AGP Interface
V
IL_A
(e,f) AGP Input Low Voltage 0.4 x VCC1_5 V
V
IH_A
(e,f) AGP Input High Voltage 0.6 x VCC1_5 V
V
OL_A
(e,g) AGP Output Low Voltage 0.15 x VCC1_5 V
V
OH_A
(e,g) AGP Output High Voltage 0.85 x VCC1_5 V
I
OL_A
(e,g) AGP Output Low Current 1 mA @V
OL_A
max
I
OH_A
(e,g) AGP Output High Current -0.2 mA @V
OH_A
max
I
LEAK_A
(e,f) AGP Input Leakage
Current
±15 µA 0<Vin<
VCC1_5
C
IN_A
(e,f) AGP Input Capacitance 1.32 1.92 pF
1.8 V Hub Interface
V
IL_HI
(i) Hub Interface Input Low
Voltage
HIREF – 0.15 V
V
IH_HI
(i) Hub Interface Input High
Voltage
HIREF + 0.15 V
V
OL_HI
(i) Hub Interface Output Low
Voltage
0.1 x VCC1_8 V I
OL
= 1 mA
V
OH_HI
(i) Hub Interface Output High
Voltage
0.9 x VCC1_8 V I
OH
= 1 mA
I
OL_HI
(i) Hub Interface Output Low
Current
1 mA @V
OL_HI
max
I
OH_HI
(i) Hub Interface Output High
Current
-1 mA @V
OH_HI
max